What 'Inversely Proportional' Means

This lesson covers:

  1. What 'inversely proportional' means
  2. What an inversely proportional relationship looks like on a graph
  3. How to write an equation to represent an inversely proportional relationship

What does it mean if two variables are inversely proportional?

As one variable increases the other variable decreases at the same rate

As one variable increases the other variable increases at the same rate 

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Is the relationship described below directly or inversely proportional?


"The time it takes to mow a lawn and the number of people helping."

Directly proportional 

Inversely proportional

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Which of the images below show an inversely proportional relationship?

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Which of the formulas below show an inversely proportional relationship between y and x?

y=x2​
y=3x
y=x
y=x2

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The relationship between y and x is:

y=x5​

What is the value of y when x is 0.2?

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Is the relationship described below directly or inversely proportional?


"The time it takes to mow a lawn, and the size of the lawn."

Directly proportional 

Inversely proportional

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